Transmission Device, Communication System, Transmission Method, and Computer Program Product

1. A server device comprising: one or more processors configured to: receive first data as part of a plurality of pieces of transmission data, from a transmission device; distribute the first data to a reception device; receive, in accordance with a request for transmission of second data that is data other than the first data among the plurality of pieces of transmission data, the second data transmitted from the transmission device; distribute the second data to the reception device; and delete all or part of target data that is at least one of the first data and the second data stored in a storage, in accordance with a predetermined condition, the storage storing therein the first data and the second data transmitted from the transmission device, wherein the target data includes first pictures and second pictures, and the one or more processors delete part of the second pictures included in the target data every time a predetermined time elapses.

2. The server device according to claim 1, wherein the one or more processors delete all or part of the target data stored for a predetermined duration.

3. The server device according to claim 1, wherein the one or more processors perform the deleting from the storage by prioritizing target data distributed to the reception device.

4. The server device according to claim 3, wherein the one or more processors determine whether the target data is distributed to the reception device by using metadata indicating whether the target data is distributed.

5. The server device according to claim 1, wherein the one or more processors delete all or part of the target data by using metadata referred to in a deletion processing.

6. The server device according to claim 5, wherein the metadata includes: a time, information indicating a position at which a start of a file including the target data is a criterion, and a name of the file.

7. The server device according to claim 1, further comprising the storage.

8. A transmission method comprising: receiving first data as part of a plurality of pieces of transmission data, from a transmission device; distributing the first data to a reception device; receiving, in accordance with a request for transmission of second data that is data other than the first data among the plurality of pieces of transmission data, the second data transmitted from the transmission device; distributing the second data to the reception device; and deleting all or part of target data that is at least one of the first data and the second data stored in a storage, in accordance with a predetermined condition, the storage storing therein the first data and the second data transmitted from the transmission device, wherein the target data includes first pictures and second pictures, and the deleting includes deleting part of the second pictures included the target data every time a predetermined time elapses.

9. A computer program product including a non-transitory computer readable medium including programmed instructions, wherein the instructions, when executed by a computer, cause the computer to perform: receiving first data as part of a plurality of pieces of transmission data, from a transmission device; distributing the first data to a reception device; receiving, in accordance with a request for transmission of second data that is data other than the first data among the plurality of pieces of transmission data, the second data transmitted from the transmission device; distributing the second data to the reception device; and deleting all or part of target data that is at least one of the first data and the second data stored in a storage, in accordance with a predetermined condition, the storage storing therein the first data and the second data transmitted from the transmission device, wherein the target data includes first pictures and second pictures, and the deleting includes deleting part of the second pictures included in the target data every time a predetermined time elapses.

10. The server device according to claim 1, wherein the one or more processors delete the second pictures included in the target data.

11. The server device according to claim 10, wherein the one or more processors delete the first pictures included in the target data after deleting the second pictures and when the predetermined time further elapses.

12. The server device according to claim 1, wherein the one or more processors delete the first pictures included in the target data after deleting the second pictures and when the predetermined time further elapses.

13. The server device according to claim 1, wherein the one or more processors delete part of the first pictures included in the target data after deleting the second pictures and when the predetermined time further elapses.

14. The server device according to claim 1, wherein the first pictures are played back alone, and the second pictures are played back in combination with the first pictures.

15. A server device comprising: one or more processors configured to: receive first data as part of a plurality of pieces of transmission data, from a transmission device; distribute the first data to a reception device; receive, in accordance with a request for transmission of second data that is data other than the first data among the plurality of pieces of transmission data, the second data transmitted from the transmission device; distribute the second data to the reception device; and delete all or part of target data that is at least one of the first data and the second data stored in a storage, in accordance with a predetermined condition, the storage storing therein the first data and the second data transmitted from the transmission device, wherein the target data includes first pictures and second pictures, the one or more processors delete the second pictures included in the target data, and the one or more processors delete part of the first pictures included in the target data after deleting the second pictures and when a predetermined time elapses.

16. A transmission method comprising: receiving first data as part of a plurality of pieces of transmission data, from a transmission device; distributing the first data to a reception device; receiving, in accordance with a request for transmission of second data that is data other than the first data among the plurality of pieces of transmission data, the second data transmitted from the transmission device; distributing the second data to the reception device; and deleting all or part of target data that is at least one of the first data and the second data stored in a storage, in accordance with a predetermined condition, the storage storing therein the first data and the second data transmitted from the transmission device, wherein the target data includes first pictures and second pictures, the deleting includes deleting the second pictures included in the target data, and deleting part of the first pictures included in the target data after deleting the second pictures and when a predetermined time elapses.

17. A computer program product including a non-transitory computer readable medium including programmed instructions, wherein the instructions, when executed by a computer, cause the computer to perform: receiving first data as part of a plurality of pieces of transmission data, from a transmission device; distributing the first data to a reception device; receiving, in accordance with a request for transmission of second data that is data other than the first data among the plurality of pieces of transmission data, the second data transmitted from the transmission device; distributing the second data to the reception device; and deleting all or part of target data that is at least one of the first data and the second data stored in a storage, in accordance with a predetermined condition, the storage storing therein the first data and the second data transmitted from the transmission device, wherein the target data includes first pictures and second pictures, the deleting includes deleting the second pictures included in the target data, and deleting part of the first pictures included in the target data after deleting the second pictures and when a predetermined time elapses.

18. A server device comprising: one or more processors configured to: receive first data as part of a plurality of pieces of transmission data, from a transmission device; distribute the first data to a reception device; receive, in accordance with a request for transmission of second data that is data other than the first data among the plurality of pieces of transmission data, the second data transmitted from the transmission device; distribute the second data to the reception device; and delete all or part of target data that is at least one of the first data and the second data stored in a storage, in accordance with a predetermined condition, the storage storing therein the first data and the second data transmitted from the transmission device, wherein the target data includes first pictures and second pictures, the one or more processors delete the second pictures included in the target data, the first pictures are played back alone, and the second pictures are played back in combination with the first pictures.

19. A transmission method comprising: receiving first data as part of a plurality of pieces of transmission data, from a transmission device; distributing the first data to a reception device; receiving, in accordance with a request for transmission of second data that is data other than the first data among the plurality of pieces of transmission data, the second data transmitted from the transmission device; distributing the second data to the reception device; and deleting all or part of target data that is at least one of the first data and the second data stored in a storage, in accordance with a predetermined condition, the storage storing therein the first data and the second data transmitted from the transmission device, wherein the target data includes first pictures and second pictures, the deleting includes deleting the second pictures included in the target data, the first pictures are played back alone, and the second pictures are played back in combination with the first pictures.

20. A computer program product including a non-transitory computer readable medium including programmed instructions, wherein the instructions, when executed by a computer, cause the computer to perform: receiving first data as part of a plurality of pieces of transmission data, from a transmission device; distributing the first data to a reception device; receiving, in accordance with a request for transmission of second data that is data other than the first data among the plurality of pieces of transmission data, the second data transmitted from the transmission device; distributing the second data to the reception device; and deleting all or part of target data that is at least one of the first data and the second data stored in a storage, in accordance with a predetermined condition, the storage storing therein the first data and the second data transmitted from the transmission device, wherein the target data includes first pictures and second pictures, the deleting includes deleting the second pictures included in the target data, the first pictures are played back alone, and the second pictures are played back in combination with the first pictures.